## anonymous 3 years ago average rate of change (function)

1. anonymous

2. anonymous

3. anonymous

$\frac{f(x)-f(1)}{x -1}$

4. anonymous

then what?

5. anonymous

then you will get your answer ~ you know what's f(x) and f(1)?

6. anonymous

no

7. anonymous

f(x) = 3/(x+4) just as the question gives to find f(1), substitute x = 1 into f(x)

8. anonymous

ok

9. anonymous

i will give you the answer in case ._., cos i gotta go $f(x) = \frac{3}{x+4}$$f(1) = \frac{3}5$$\huge \frac{\frac{3}{x+4}-\frac{3}{5}}{x-1}$then solve algebraically you will get$\frac{-3}{5x+20}$

10. anonymous

thank you